The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 1992
Filed:
Jan. 29, 1991
Applicant:
Inventors:
Kyu-Nam Joo, Seoul, KR;
Jong-In Jung, Kyunggi-do, KR;
Jong-Suh Choi, Kyunggi-do, KR;
Hwan-Chul Rho, Seoul, KR;
Assignee:
Samsung Electron Devices Co., Ltd., Kyunggi-Do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313270 ; 3133 / ;
Abstract
A dispenser cathode includes a tungsten matrix which is impregnated with an active cathode material and coated with a refractory thin film layer metal material along the surfaces thereto, but not including the electron emissive surface of the matrix, thereby improving a heat transfer efficiency from a heater to the electron emissive surface.